<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>07_Bootrstap-网格系统auto列宽</title>
  <link rel="stylesheet" href="./libs/bootstrap-4.6.1/css/bootstrap.css">
  <style>
    .container {
      background-color: pink;
    }
    .item {
      height: 40px;
      border: 1px solid red;
    }
  </style>
</head>
<body>

  <h3>1. 网格系统-等列宽- flex-grow:1</h3>
  <div class="container">
    <div class="row">
      <div class="col-auto item">auto layout layout layout </div>
      <div class="col item">1</div>
      <div class="col item">2</div>
      <div class="col item">3</div>
    </div>
  </div>

</body>
</html>